diff --git a/pkgs/tools/security/trustymail/default.nix b/pkgs/tools/security/trustymail/default.nix
new file mode 100644
index 00000000000..eb384ce1625
--- /dev/null
+++ b/pkgs/tools/security/trustymail/default.nix
@@ -0,0 +1,47 @@
+{ lib
+, fetchFromGitHub
+, python3
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "trustymail";
+  version = "0.8.1";
+  format = "setuptools";
+
+  src = fetchFromGitHub {
+    owner = "cisagov";
+    repo = pname;
+    rev = "refs/tags/v${version}";
+    hash = "sha256-hKiQWAOzUjmoCcEH9OTgkgU7s1V+Vv3+93OLkqDRDoU=";
+  };
+
+  postPatch = ''
+    substituteInPlace pytest.ini \
+      --replace " --cov" ""
+  '';
+
+  propagatedBuildInputs = with python3.pkgs; [
+    dnspython
+    docopt
+    publicsuffixlist
+    pydns
+    pyspf
+    requests
+  ] ++ publicsuffixlist.optional-dependencies.update;
+
+  nativeCheckInputs = with python3.pkgs; [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "trustymail"
+  ];
+
+  meta = with lib; {
+    description = "Tool to scan domains and return data based on trustworthy email best practices";
+    homepage = "https://github.com/cisagov/trustymail";
+    changelog = "https://github.com/cisagov/trustymail/releases/tag/v${version}";
+    license = with licenses; [ cc0 ];
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 05ffb5c2b6e..2686e542edd 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -26917,6 +26917,8 @@ with pkgs;
 
   trust-dns = callPackage ../servers/dns/trust-dns { };
 
+  trustymail = callPackage ../tools/security/trustymail { };
+
   tunctl = callPackage ../os-specific/linux/tunctl { };
 
   twa = callPackage ../tools/networking/twa { };